THE FIRE WORM OF THE CRANBERRY. 13 
struction not only of the insects but of all hope of acrop as well. After 
the berries have fully formed, the bog cannot safely be submerged, for the 
hot sun would cause them to “scald.” In one case in Cape Cod during 
a heavy rain-storm a bog was partially flowed; the sun came out strong 
before the water could be all drawn off; nearly half the berries were 
scalded. Yet the water can be advantageously used in two ways. 
Where there is an abundant supply it should be drawn off very early, 
say the middle of April or even earlier if the season is advanced. In 
parts of a bog not submerged, larve were found in considerable num- 
bers on the 16th of April, and of these the imagines emerged June 2, or 
thereabouts. 
Careful watch should be kept for the appearance of the larvee, and 
when they are abundant and presumably all hatched, the water should 
be put on for twenty-four hours or longer. _No harm will be done by 
allowing the larve to feed a few days before putting on the water, as 
they have only the old leaves, and do not eat off the terminal bud. 
Flowing a second time at this season will do no harm, as the sun is not 
hot enough to hurt the vines or the new shoots if they have appeared. 
The period of time required for the larvee to hatch, varies with the tem- 
perature of the air, and with the temperature of the water with which 
they had been covered. This course has been tried by several growers 
with complete success. The larve are of course not all destroyed, but 
so few survive that no great damage is done, and they can be treated 
as hereafter described. Mr. Hopkins, of Hornerstown, reflowed his 
bog late in June or early in July for the second brood. I am informed 
that scarcely had the water covered the vines than the larve began ap- 
pearing at the surface; it is their habit whenever their habitation is 
disturbed to slip out of the same and drop to the ground; the water 
was a disturbing element, and following their usual practice they 
found themselves afloat. Only a part of the bog could be flowed, and 
when the water was drawn oft, a line of dead larve was heaped on the 
side toward which the wind had carried them. The weather was favor- 
able, and there was no scald, but still a large portion of the berries were 
destroyed. On July 10, I examined the bog and could easily trace the 
line to which the water had reached. Scarcely a larva was found in the 
flowed portion, while the high parts to which the water had not reached 
were rapidly being eaten up. Last season, as I am informed, the in- 
sects being plentiful, the bog was entirely flowed; the insects were de- 
stroyed, but so was the crop. With a level bog and a large supply of 
water, a bog could be safely flowed for forty-eight hours at any time 
except when flowering, if a cool spell be selected for that purpose. 
Where water is scarce and the bog cannot be readily flowed, another 
course must be pursued. Instead of drawing the water early, it should 
be kept on as late as possible, and should be drawn off very gradually 
from below. The reason for that is that the water becoming warm will 
cause the development of the larva in the egg, and will then suffocate 
